<!DOCTYPE HTML>
<html>
  <!--
  https://bugzilla.mozilla.org/show_bug.cgi?id=633602

  Test DOM tree in full screen
  -->
<head>
<title>Bug 633602 - file_DOMtree.html</title>
<script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="application/javascript" src="pointerlock_utils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank"
    href="https://bugzilla.mozilla.org/show_bug.cgi?id=633602">
  Mozilla Bug 633602
</a>
<div id="div"></div>
<div id="outer"><div id="inner"></div></div>
<pre id="test">
<script type="text/javascript">
/*
  * Test for Bug 633602
  * Checks if pointer is unlocked when element is removed from
  * the DOM Tree
  */

SimpleTest.waitForExplicitFinish();

var div = document.getElementById("div");
var outer = document.getElementById("outer");
var inner = document.getElementById("inner");

function listenOneDocEvent(type, handler) {
  function callback(event) {
    document.removeEventListener(type, callback);
    SimpleTest.executeSoon(() => handler(event));
  }
  document.addEventListener(type, callback);
}

function checkPointerLockElement(elem) {
  if (elem) {
    is(document.pointerLockElement, elem,
       `#${elem.id} should have locked the pointer`);
  } else {
    ok(!document.pointerLockElement, "Pointer should have been unlocked");
  }
}

function start() {
  addFullscreenChangeContinuation("enter", enteredFullscreen);
  document.documentElement.requestFullscreen();
}

function enteredFullscreen() {
  is(document.fullscreenElement, document.documentElement,
     "Root element should have entered fullscreen");
  listenOneDocEvent("pointerlockchange", lockedPointerOnDiv);
  div.requestPointerLock();
}

function lockedPointerOnDiv() {
  checkPointerLockElement(div);
  listenOneDocEvent("pointerlockchange", unlockedPointerFromDiv);
  document.body.removeChild(div);
}

function unlockedPointerFromDiv() {
  checkPointerLockElement(null);
  listenOneDocEvent("pointerlockchange", lockedPointerOnInner);
  inner.requestPointerLock();
}

function lockedPointerOnInner() {
  checkPointerLockElement(inner);
  listenOneDocEvent("pointerlockchange", unlockedPointerFromInner);
  document.body.removeChild(outer);
}

function unlockedPointerFromInner() {
  checkPointerLockElement(null);
  addFullscreenChangeContinuation("exit", exitedFullscreen);
  document.exitFullscreen();
}

function exitedFullscreen() {
  SimpleTest.finish();
}
</script>
</pre>
</body>
</html>
